单选题He had no alternative but ______ to fight in the Middle East.

单选题The question of whether war is inevitable is one which has concerned many of the world's great writers. Before considering this question, it will be useful to introduce some related concepts. Conflict, defined as opposition among social entities directed against one another, is distinguished from competition, defined as opposition among social entities independently striving for something which is in inadequate supply. Competitors may not be aware of one another, while the parties to a conflict are. Conflict and competition are both categories of opposition, which has been defined as a process by which social entities function in the disservice, of one another. Opposition is thus contrasted with cooperation, the process by which social entities function in the service of one another. These definitions are necessary because it is important to emphasize that competition between individuals or groups is inevitable in a world of limited resources, but conflict is not conflict; nevertheless, is very likely to occur, and is probably ,an essential and desirable element of human societies. Many authors have argued for the inevitability of war from the premise that in the struggle for existence among animal species, only the fittest survive. In general, however, this struggle in nature is competition, not conflict. Social animals, such as monkeys and cattle, fight to win or maintain leadership of the group. The struggle for existence occurs not in such fights, but in the competition for limited feeding areas and for the occupancy of areas free from meat-eating animals. Those who fail in this competition starve to death or become victims to other species. This struggle for existence does not resemble human war, but rather the competition of individuals for jobs, markets, and materials. The essence of the struggle is the competition for the necessities of life that are insufficient to satisfy all. Among nations there is competition in developing resources, trades, skills, and a satisfactory way of life. The successful nations grow and prosper; the unsuccessful decline. While it is true that this competition may induce efforts to expand territory at the expense of others, and thus lead to conflict, it cannot be said that war-like conflict among nations is inevitable, although competition is.

单选题It can be inferred from the passage that the blame for the present state of affairs lies in the fact that ______.

单选题If the straggle for a sustainable society______, we must have some vision of what we are aiming for.

单选题With three young children to take care of, Cathy is kept on the run every minute of the day. A. walking B. at full speed C. busy D. on foot

单选题All the students in this university are Urequested/U to comply with the regulations.

单选题AIDS is causing great public concern because the ______ fatal disease hits primarily young people.(2002年中国人民大学考博试题)

单选题This is the seventh year _______ that they've won the cup.

单选题With the purchasing power of many middle-class households ______ behind the cost of living, there was an urgent demand for credit. A. leaving B. levering C. lacking D. lagging

单选题Is it more truly democratic to hold a ______, rather than let the government alone decide an important issue. A. reincarnation B. referendum C. refinery D. regression

单选题He complied with the requirement that all graduate students in education ______ a thesis.

单选题The lecturer______his explanation with some tape recordings.

单选题For more than 40 years, Earth has been sending out distress signals. At first they were subtle, like the thin shells of bald-eagle eggs that cracked because they were laced (使混合) with DDT. Then the signs were unmistakable, like the covering of smoke over the Amazon rain forest, where farmers and ranchers (牧场主人) set fire to clear land. Finally, as the new millennium drew near, it was obvious that Earth's pain had become humanity's pain. The collapse of the North Atlantic cod (鳕鱼) fishery put 30,000 Canadians out of work and ruined the economies of 700 communities. In 1998, deforestation worsened China's floods, which killed 3,600 people and left 14 million homeless. Population pressures and overcrowding raised the toll from 1999's rains in Latin America, which killed more than 30,000 people and created armies of environmental refugees. And how have we responded to four decades of ever louder distress signals? We've staged a procession, of Earth Days, formed Green parties, passed environmental laws, forged a few international treaties and organized global gabfests (杂谈会) like the 1992 Earth Summit in Rio de Janeiro. All the while, the decline of earth's ecosystems has continued unabated. What will it take for us to get serious about saving our environment? When will environmentalism more from being a philosophy promoted by a passionate minority to a way of life that governs mainstream behavior and policy? How can we understand that Earth is one big natural system and that torching tropical rain forests and destroying coral reefs (珊瑚礁) will eventually threaten the well-being of towns and cities everywhere? One crucial step is a true accounting of the state of the planet, a thorough assessment of the health of all Earth's major ecosystems, from oceans to forests. Only a comprehensive global survey can show how damage to one system is affecting other systems and can determine whether Earth as a whole is losing its ability to nurture the full diversity of life and the economies of nations.

单选题In ancient times, some catastrophic extinction of species occurred______.(2004年武汉大学考博试题)

单选题How do aristocratic societies' perception of spiritual powers influence whether they are "favor able to poetry" or not?

单选题American football and baseball are becoming known to the British public through televised______from the United States. A. transfer B. deliveries C. transportation D. transmissions

单选题The accident ______ him of his sight and the use of his legs. A. excluded B. disabled C. deprived D. gripped

单选题He was so ______ at tying fisherman's flies that he was asked to demonstrate his technique at sports fairs and exhibitions.

单选题A Since it is necessary for about nine-tenths of the volume of sea water to evaporate for rock salt to be formed, it is believed that the thick rock rock-salt beds that are found B were deposited C in D what are used to be partly enclosed seas.